Two wires of copper have lengths L and 2L and cross sectional area 2A and A, respectively. The ratio of their specific resistance would be-
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 1 : 1
Specific Resistance of a material (ρ) is -
$ρ=R\frac{A}{L}$
However,
Specific Resistance is an material property and therefore would remain same for both the copper wire.